Heat the oil in a casserole or deep saucepan over medium heat. Add the onion and cook, stirring, for 3-4 minutes until softened. Add the garlic, spices and harissa, and cook for 2 minutes or until fragrant. Add the prawns, fish and chickpeas. Cook, stirring, for 2 minutes, then add tomato and stock. Season and bring to a simmer, then cook for 4-5 minutes until slightly reduced.
Step 2
Add pipis, peas and beans, then cover with a lid and cook for a further 5 minutes or until the shells have opened. Remove from heat.
Step 3
Scatter the tagine with mint and serve with couscous topped with almonds.